Set of bristles for a toothbrush



FIG. 1 is a perspective front view of a set of bristles for a toothbrush showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a head end view thereof.

The broken line showing of the remainder of the toothbrush for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a set of bristles for a toothbrush, as shown and described. 